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From the germinal cells to the newborn animal: the transmission of genes and life through the generations
Drion, Pierre; Scenzi, Otto; Ectors Francis et al.
1999
Peer reviewed
 

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Keywords :
ovarian follicle; cow; follicular growth; regulation; in vitro; in vivo
Abstract :
[en] During the last decade, the technology of reproduction progressed considerably leading to a certain availability of in vitro methods for fertilization, maturation of the oocyte and culture system for the embryos. The most spectacular manipulations are cloning and transgenesis… This review focuses on the early appearance of the germinal cells precursors and the longstanding destiny of the gametes in mammals. The evident complexity and long-term programmation of events in gametes and early embryo explain the difficulties to succeed in in-vitro methods and the occurrence of unexpected alterations of development, e.g. embryonic or fetal mortalities, large weight newborn syndrome and other dys-regulations in imprinting or DNA transmission. “Studying and teaching the reproductive physiology in mammals, we sometimes imagine that a newborn animal survived two pregnancies: the first one would be a high risk pregnancy that represents the oocyte development and survival inside the follicle with a tetraploïd genome and the zona pellucida & cumulus cells as placenta-like structures. Around the first birth (ovulation), oocytes (individuals) accept in vitro conditions for maturation, fertilization and culture. Afterwards, a second pregnancy will be necessary in the mother or in the recipient uterus; a low risk pregnancy depending on the oocyte competence acquisition and on the conditions or length of exposure in vitro. “
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Drion, Pierre ;  Université de Liège - ULiège > Services généraux (Faculté de médecine vétérinaire) > Méth. expér. des anim. de labo et éthique en expér. animale
Scenzi, Otto
Ectors Francis
Beckers, Jean-François  ;  Université de Liège - ULiège > Département de sciences fonctionnelles > Physiologie de la reproduction
Language :
English
Title :
From the germinal cells to the newborn animal: the transmission of genes and life through the generations
Publication date :
May 1999
Event name :
11e Middle European Buiatrics Congress
Event organizer :
European Buiatrics Congress Comitee
Event place :
Balatonfured, Hungary
Event date :
Mai 1999
By request :
Yes
Audience :
International
Pages :
165-178
Peer reviewed :
Peer reviewed
Available on ORBi :
since 30 August 2009

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